GeForce 9800 GTX+ vs Radeon HD 6790

Intro

Compare those specifications to the Radeon HD 6790, which features GPU core speed of 840 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 256-bit bus. It also is made up of 800 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX+		145 Watts
Radeon HD 6790		150 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6790 should be quite a bit faster than the GeForce 9800 GTX+ in general. (explain)

Radeon HD 6790		134400 MB/sec
GeForce 9800 GTX+		70400 MB/sec
	Difference: 64000 (91%)

Texel Rate

The GeForce 9800 GTX+ is much (more or less 41%) faster with regards to anisotropic filtering than the Radeon HD 6790. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 13632 (41%)

Pixel Rate

The Radeon HD 6790 is a little bit (more or less 14%) better at FSAA than the GeForce 9800 GTX+, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 6790		13440 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 1632 (14%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.